Machine-tool stop.



No. 767,592. PATENTED AUG. 16, 1904.

J. B. ORBISON. MACHINE T001. STOP.

APPLICATION FILED NOV. 30, 1903. N0 MODEL.

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UNITED STATES Patented August 16, 1904.

PATENT OEEICE.

MACHINE-TOOL STOP.

SPECIFICATION forming part of Letters Patent No. 767,592, dated August16, 1904.

Application filed November 30,1903. Serial No. 183,251. (No model.)

To au whom t may concern:

Be it known that I, JAMES B. ORBIsoN, a citizen of the United States,residing at San Francisco, county of San Francisco, and State ofCalifornia, have invented certain new and useful Improvements inMachine-Tool Stops; and I hereby declare the following to be a full,clear, and exact description of the same, reference being had to theaccompanying drawings, forming a part of this specification.

This invention relates to machine-tools and to an improved method ofstops to determine the range of turret and y other slides in such tools.

My improvements consist in a revoluble barrel or cylinder provided witha series of concentrically-disposed stop-screws therein, devices torevolve and lock this barrel or cylinder and also the stop-screwstherein, as hereinafter more particularly described, and illustrated bydrawings that form a part of this specification.

The objects of my invention are to provide a positive and convenientstop-motion for turret-slides and in like cases permitting accurate andeasy adjustment to suit the requirements of the work and the position ofthe tools.

Referring to the drawings, Figure I is a plan View of a turret-latheprovided with my improvement. Fig. II is an enlarged longitudinalsection through the stop-cylinder. Fig. III is an end view of Fig. II atthe front. Fig.

IV is an end view of the disk at the rear end of Fig. II. Fig. Vis asideview of the bracket that su pports the stop barrel or cylinder. Fig. VIis'a partial view of the turning devices to revolve the stop barrel orcylinder. Fig. VII is a front view of the stationary .stop-screw, andFig; VIII is an end view of Fig. VII.

In operating with turret-tools and others of the kind it is essentialthat their forward range be accurately controlled by stops and thatthese stops be readily set and adjusted as the work requires.

Referring to the drawings representing an application of my invention, 1is a common turret-machine; 2, the revoluble turret; 3 the slide orcarriage on which the turret 2 is mounted; 4, a hand-wheel to move thecarriage 3, and 5 tools inserted in the turret. 7 is a revoluble barrel'supported in a bracket 8, that is attached to the rear end of thecarriage 3, as shown in Fig. I. This barrel 7 is bored longitudinallywith apertures 10, screw-threaded at 12 to receive a series ofstop-screws 9as many in number as there are tools in the turret. Thesescrews 9 iit through the holes 10 in the barrel 7 and run in thescrew-threads at 12. Said stop-screws also run in the screw-threads of amovable follower-plate 13, similarly perforated, that is forced outwardby a screw 14, as shown in Fig. II, thus clamping in the manner of ajam-nut at one motion all the screws 9. This adjustment gives rigid ityto the screws 9 and permits them all to be loosened or fastened at onetime.

In cases Where it is desirable to adjust one or more of the screws 9without disturbing or loosening the rest I employ set-screws 15, thatcan be used in conjunction with the follower-plate 13 to avoidaccidental change of the screws 9 after these are adjusted.

To revolve the barrel 7 at each movement or stroke of the carriage 3 orat each operation of the turret-tools 5, there is a cross slid- "ing bar17, having-a hinged pawl 18, that engages the spaced pins 19 in the endof the barrel 7, as shown in Fig. VI. This sliding' bar 17 is moved by alever 20, pivoted at 22 to the slide or carriage 3, as shown in Fig. I.This lever 2O has on its outer face a ledge 23, that engages the roller24 as the carriage 3 is moved back, pressing the slide 17 inward andturning the barrel 7 accordingly at each traverse Vof the carriage 3.When the carriage 3 is moved forward, a spring 25 resets the lever 20and retracts the slide 17.

To hold the barrel 7 accurately and bring the screws 9 into alinementwith the stopscrew 27, fixed on the frame of the lathe, I employ adefecting-spring 28, fastened on Athe bracket 8 and formed at itsforward end to fit into the curved recesses 29 in the follower 13,corresponding in number to that of the stopscrews and of the tools inthe turret, thus giving six positions corresponding to the screws 9, asillustrated in Fig. V.

The screws 9 abut against the stop-screw 27, permitting the tools 5 toadvance to a particular range determined accurately by adjust- TOO mentat the beginning, each of these screws 9 representing one of the tools 5in the turret 2, which is turned coincidently by the usual automaticdevices beneath. (Not shown in the drawings.)

Constructed in this manner it will be seen that my improved stop devicesdo not require a special design of the main machine, but can be appliedto machine-tools in use and arranged for other forms of stop devices.

Having thus explained the nature and objects of my invention,what Iclaim as new, and desire to secure by Letters Patent, is-

l. In a turret-lathe, in combination with the turret-slide, a revolublebarrel axially mounted on said slide in its line or' motion, litted witha series oi' concentrically-disposed longitudinal stop-screwscorresponding in number with the number of tools in the turret, a fixedstop on the lathe-frame against which said stop-screws impinge to limitthe forward range of the slide, a cross sliding bar engaging saidrevoluble barrel at intervals, a pivoted lever connected to said slidingbar, a cam on said lever, a-iixed abutment to engage the cam as theslide moves back, whereby the said barrel is rotated to a new positionat each backward movement of the slide, and means to hold said barrel ineach new position with the corresponding' stop-screw in alinement withthe ixed stop on the lathe-frame, substantially as specilied.

2. In a turret-lathe, in combination with the turrretslide,a revolublebarrel carried upon said slide, having aseries of concentricallydisposed longitudinal screw threaded apertures therein, a movablefollower having screw-threaded apertures corresponding in position tothe apertures of the barrel, a series of stop-screws iitting thescrew-threaded apertures of both barrel and follower, and a centralscrew, threaded into said follower, and having a bearing in said barrel,whereby the follower is controlled to act as a jam-nut to clamp all thestop-screws simultaneously and release the same, substantially asspecied.

3. In a turret-lathe, in combination with the turret-slide, a revolublebarrel having longitudinal screw-threaded apertures therein, a movablefollower having screw-threaded apertures corresponding in position tothe apertures of the barrel, aseries of stop-screws itting thescrew-threaded apertures of both barrel and follower, means to move saidfollower to jam all the said stop-screws simultaneously, and separateset-screws for locking each stop-screw individually` substantially asspeciiied.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES B. ORBISON.

